Ping. I've now tested this patch in both 32-bit and 64-bit kernels.
On Thu, Jan 20, 2005 at 07:59:54PM -0500, Daniel Jacobowitz wrote:
> I wanted to do live debugging on an ornery task_struct this morning, so I
> hooked up /proc/kcore for MIPS. I'm pretty sure that the CKSEG0 bits are
> wrong, but I did need to cover that region - because the SB-1 kernel links
> at 0xffffffff80100000 or so, disassembly and printing static variables don't
> work unless the debugger can read that region.
>
> Signed-off-by: Daniel Jacobowitz <dan@xxxxxxxxxxxxxxxx>
>
> Index: linux/arch/mips/mm/init.c
> ===================================================================
> --- linux.orig/arch/mips/mm/init.c 2005-01-20 16:26:58.791321462 -0500
> +++ linux/arch/mips/mm/init.c 2005-01-20 16:34:27.231213174 -0500
> @@ -24,6 +24,7 @@
> #include <linux/bootmem.h>
> #include <linux/highmem.h>
> #include <linux/swap.h>
> +#include <linux/proc_fs.h>
>
> #include <asm/bootinfo.h>
> #include <asm/cachectl.h>
> @@ -197,6 +198,11 @@
> return 0;
> }
>
> +static struct kcore_list kcore_mem, kcore_vmalloc;
> +#ifdef CONFIG_MIPS64
> +static struct kcore_list kcore_kseg0;
> +#endif
> +
> void __init mem_init(void)
> {
> unsigned long codesize, reservedpages, datasize, initsize;
> @@ -247,6 +253,16 @@
> datasize = (unsigned long) &_edata - (unsigned long) &_etext;
> initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
>
> +#ifdef CONFIG_MIPS64
> + if ((unsigned long) &_text > (unsigned long) CKSEG0)
> + /* The -4 is a hack so that user tools don't have to handle
> + the overflow. */
> + kclist_add(&kcore_kseg0, (void *) CKSEG0, 0x80000000 - 4);
> +#endif
> + kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
> + kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
> + VMALLOC_END-VMALLOC_START);
> +
> printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
> "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n",
> (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
>
> --
> Daniel Jacobowitz
>
>
--
Daniel Jacobowitz
CodeSourcery, LLC
